Francis leglike



(No Model.)

P. LEOLERE.

0AM FOR LOOMS, &o.

l lnvemiol' Patented Dec. 6,1881.

UNITED STATES *ATLENT OFFICE.

FRANCIS LEOLERE, or PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO STOCKTON BATES, OF SAME PLACE.

CAM FOR Looms, 84c.

SPECIFICATION forming part of Letters Patent No. 250,550, dated December 6, 1881, I

I Application filed March 9, 1881. (No model.)

.To rill whom it may concern.-

Be it known thatI, FRANCIS LEcLhRE, a citizen of the United States, residing in Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Gamsfor Looms, of which the following is a specification.

My invention relates to the construction of the bearing eye or hub of cams, and also to means for confining the cam upon its shaft; and it consists, first, in providing narrow internal ribs on each side of the center of the hub at that part of the cam which of necessity ismade the weakest, and a wider bearing-block directly above said narrow rib, whereby the strain upon the wealgest part of the cam, as heretofore constructed, is transferred to the stronger portions of the cam, and thus danger of breakage is greatly diminished, and at the same time expense of making the cam with a truly bored or turned eye, and the weakening of the metal by turning off the scale thereof, are avoided; second, in a wedge-fastening formed of two blocks, one of which blocks is parallel on its bottom with the camshaft and has an inclined recessed upper surface, while the other block has an inclined recessed bottom surface, and a rounded top surface which is parallel with the cam-shaft, and the two blocks having a draw-bolt passed between them, whereby the upper one is moved longitudinally and vertically, and thereby made to force down the other block (without sliding said block) upon the cam-shaft in a manner to firmly unite thecam to its shaft, thus avoiding any indentation or marring of the shaft, and permitting the very nicest adjustments of the cam on the shaft circumfereutially, as occasion may require; third, in resting lugs formed on each side of the walls of the cam at the place where the hub or eye is cut away to admit the lower wedge-block, in combination with recesses formed in the sides of the said wedge-block, whereby said wedge-block is seated and prevented from falling down into the eye or hub. of the cam when the cam is off its shaft; fourth, in a pin-hole formed in the front of the cam, whereby facilities for releasing the bite of the wedging device upon the cam-shaft are afforded, as occasion may require; and, fifth, in a separate plate of steel or metal interposed between the upper cast-iron .the cast-metal cam, whereby the expense of planing the surface of the said sustaining part of the cam is avoided. i

In the accompanying drawings, Figure 1 represents the cam-shaft and the cam as seen from the rear, the shaft being sectioned transversely. Fi g.2isaverticallongitudinal section of the cam audits wedge-fastening, the cam-shaft and the draw-bolt of thewedge-fastening being shown in elevation. Fig. 3 represents, in perspective, the lower and upper wedge-blocks and the steel plate used with the same. Fig. 4 is a' perspective view of the camvdetached from its shaft and as seen from its front side.

The cam-A, so far as its lifting action is concerned, forms no part of my invention, and in this respect may be of any approved construction. This cam, as shown, I form with a rectangular recess, a, which is open at its rear for the admission of two wedge-blocks, B B, a draw-bolt, O, and a steel plate, D, as shown. At front, sides, and top walls are formed about the recess a, but at bottom the metal is removed in order that the wedge-block B may extend down into the eye of the hub of the cam, as shown in Figs. 1 and 2.

On each side of the wedge-block B a rectangularreeess, I), is formed, and on the cam lugs c c are provided, and when the wedge-block is seated in the recess a of the cam these lugs prevent it from falling down into the eye of the hub of the cam. Asut'ficient vertical play ofthe wedge-block is allowed between the top shoulders of the recesses b and the lugs 0 to permit the bloclntotbe wedged downward by the upper block, B, upon the cam-shaft E.

Referring to Figs. 1 and 4, it will be seen that narrow ribs cl d are formed within the eye of the cam, on each side of the vertical axis of the said eye, these ribs standingin relief from the eye or bore proper of the cam and occupyingidiagonal positions with respect to the ver tical and horizontal axes of the shaft E. These ribs may be planed, but it is not necessary to plane or turn out the eye of the hub, and this wedge-block and the sustaining top portion of shown.

being so, the strength due to the scale of the iron remaining undisturbed will be added to that of the cam. The two ribs 01 d, in connection with the projecting top bearin g, d, afforded by the bottom wedge-block, B, sustain the great strain of the cam upon the shaft, or of the shaft upon the cam, and as this strain is brought upon three points which are away from the weakest part 0 of the cam, there will be very little danger of the cam breaking at said point e. The distribution of the strain in the manner illustrated also enables me to hold the shaft and cam more securely by a wedgefa'steningthan when the shaftis wedged against a continuous concentric bearing-surface of the eye, as the diagonally-set bearing-points act as counter-abutments to any-force which might tend to turn the cam or shaft independently of each other.

Referring to Figs. 2 and 3, it will be seen that the wedge-block B is formed with a parallel or horizontal concave bottom surfaee,f, and an inclined top surface, g, a portion of which latter is depressed so as to form a parallel or horizontal half, or nearly half, passage, 9 for the draw-bolt G. This block is longer than the block B, in order to provide for the necessary longitudinal movement of the block B upon it, and also in order that the head of the draw-bolt may be forced upward by it while the pressure or force necessary for uniting the cam to its shaft is being applied to the nut of the said bolt. I

Theblock B is parallel on its upper side, h, and inclined on its bottom side, 1', with respect to the shaft E, and in said bottom side asemi-elliptical depression is provided,to form a continuation, g, of the bolt-passage 9 as The block B is shorter than the length of the recess a of the cam, and it is also of less depth than the space between the top of said recess and the top of the block B, in order that it maybe moved longitudinally in said recess, and also in order that the steel plate D may be placed between it and the sustaining portion 7' of the cam. The two depressions g 9 when united, form a vertically elongated or 0blong bolt-passage, and by this means the rise and descent of the head of the bolt are permitted, accordingly as the wedge-block B is either drawn forward on the wedge B or forced backward on the same.

In order to insure a central resistance of the plate D upon the wedge B, the wedge B is made with a rounded or segmental upper surface,h, whieh,as before stated, is parallel with the cam-shaft. This rounded surface bears with its highest part upon the center-of the steel plate D, and consequently the pressure upon the wedge-blocks B and B is uniform from their center to outer edges.

The head of the draw-bolt O is made quite broad, and its inner surface, 7c, is rounded off, in order that the pull of the bolt shall be directly in line with its center, and also that binding and friction may not be experienced as the bolt rises in its passage g g. The screwthreaded end of the bolt (3 passes through the face or front wall of the cam, and at this point a slight play is allowed, as indicated at. l.

A nut, m,.and washer a are applied upon the bolt. Just above the bolt a pin-hole,p, is provided in the front wall of the cam,and bydriving a pin through this hole the wedge-block B can be moved back upon the wedge B, and thereby the bite of the block B upon the camshaft'can be relieved.

From the foregoing description it may be seen that the operation of turning the nut on will cause the bolt 0 to draw the wedge-block B up the incline g of the wedge-block B, and this operation will not slide the block B, and thereby cause it to wedge into the shaft, but will .simply cause said blockto press vertically against the shaft with its bottom surface, which is parallel with the shaft.

Itis very desirable to be able to use a wroughtmetal bolt made separate from the wedgeblocks, which are made of cast metal. Such bolts are more durable than those cast on a wedge-block. Itis also veryim portant to have the wedge-fastening formed of two parts and so operated that the part which bears on the shaft shall not move longitudinally, and in moving indent or mar the shaft. Especially is this the case with fastenings for loom-cams, for the reason that it is very often necessary that the very finest adjustments of the cam on its shaft with respect to the motions of the parts of a loom require to be made, and these adjustments could not be effected if the shaft wereindented, grooved, or otherwise depressed by the action of the wedge-fastening. My parallel bearing-block B overcomes the difficulty, and enables the weaver to make the nicest adjustments required.

The wedge-tasteningdevice herein described may be applied forfasteninghubs, pulleys, and wheels, as the same may be found desirable, but its greatest utility is developed when used in connection with loom-cams.

The wedge-block B might be flat on its top, and it might be made to bear directly against the top-sustaining portion of the cam, having no plate D interposed; but such constructions are not the best to be adopted.

What I claim as my invention, and desire to secure by Letters Patent, is-- 1. The cam provided with ribs (1 d, and the bearing d in relief from the surface surrounding the bore or eye proper of the hub of the cam, substantially as and for the purpose described.

2. The wedge-fastening device, consisting of the two blocks B B and the draw-bolt 0 passed between the blocks, in combination with the cam and its shaft, substantially as and for the purpose described.

3. The cam provided with the retaininglugs c c, in combination with the block B, provided with recesses 11 b, substantially as and for the purpose described.

4 The cam provided with the pin-hole p opposite the wedge-block B, substantially as and for the purpose described. I

5. The combination of the smooth steel plate D. Wedge-fastenine blocks, draw-bolt,

cam, and cam-shaft, substantially as and for the purpose described.

6.- The block B, parallel on its upper side, and rounded or of segmental form transversely on said side, in combination with the bearingplate D, wedge-block B, drawbolt O, cam, and cam-shaft, substantially as and for the purpose described.

FRANCIS LEOLERE.

Witnesses:

SHELDON POTTER, W. E. EVA. 

